Fuel Line
Thread Starter
Instructor
Joined: Jul 2016
Posts: 195
Likes: 1
From: Littleton Colorado
Fuel Line
Is it standard to use rubber hose from the fuel filter to the carb for a 1968 corvette?
I was trying to track down a vapor lock problem and noticed that it is all rubber.
Doesn't rubber expand and contract on different weather conditions?
I was trying to track down a vapor lock problem and noticed that it is all rubber.
Doesn't rubber expand and contract on different weather conditions?
Safety Car
Joined: Oct 2007
Posts: 3,729
Likes: 267
From: Austin Texas
Corvette of the Year Winner 2017
2016 C3 of Year Finalist
standard for Bubbba, oem is steel.
the rubber hose is not your vapor lock problem, it is a very high fire hazard.
for vapor lock issue, first step put 1/4" thick gasket under the carb.
this will isolate carb. from engine heat.
also make sure your filter return line, is connected all the way back to the tank.
the rubber hose is not your vapor lock problem, it is a very high fire hazard.
for vapor lock issue, first step put 1/4" thick gasket under the carb.
this will isolate carb. from engine heat.
also make sure your filter return line, is connected all the way back to the tank.
Last edited by 69Vett; Jul 23, 2016 at 03:18 PM.
Thread Starter
Instructor
Joined: Jul 2016
Posts: 195
Likes: 1
From: Littleton Colorado
I was driving my car today and it wasn't too hot outside; however, it died again when I was waiting at a red light. Really odd because the engine doesn't shudder or anything. Almost like it was off and I put it in gear.
I've heard that I can add additional additives besides lead that might help. My dad had a model a and he would put a little bit of diesel in his tank. Otherwise, the O'Reily guy sold me some expensive additive.
My tank is about empty so I'll try the diesel first.
Anyone try this too?
I've heard that I can add additional additives besides lead that might help. My dad had a model a and he would put a little bit of diesel in his tank. Otherwise, the O'Reily guy sold me some expensive additive.
My tank is about empty so I'll try the diesel first.
Anyone try this too?
Race Director
Joined: Mar 2003
Posts: 11,608
Likes: 778
From: Eustis ( Area 51 Bat Cave ) Fl
the rubber fuel lines are a scary thing, if one leaks and rubber fuel lines always leak they leak gasoline on things that do not really want gasoline leaked on them, could burst into flames....
diesel in gasoline can kill sensors in later computer controlled vehicles,
Besides adding a little lubrication I do not see a benefit to adding diesel to gasoline,
I kind of have doubts that your dying problem is vapor lock related but likely something else is out of tune/adjustment, check timing and vacuum leaks, perhaps the idle is simply set too low....
diesel in gasoline can kill sensors in later computer controlled vehicles,
Besides adding a little lubrication I do not see a benefit to adding diesel to gasoline,
I kind of have doubts that your dying problem is vapor lock related but likely something else is out of tune/adjustment, check timing and vacuum leaks, perhaps the idle is simply set too low....
Race Director
Joined: Oct 2000
Posts: 12,613
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From: Shamong, NJ
What makes you think the problem is vapor lock? Vapor lock is pretty uncommon any more. If your fuel pump is good, I find it hard to believe that you're having a vapor lock problem.
I've owned a number of Model A's, and never had a vapor lock problem with any of them. Model A's have a gravity fed fuel system, with the gas tank in the cowl and the fuel line's only about a foot long. Now I've also had a few of 32-41 flathead Ford V8's, and I often struggled with them vapor locking. Either way, I've never heard of using diesel fuel to combat it, and don't think I would ever put diesel in a Corvette.
I'd be more inclined to think the issue was ignition related, maybe a bad coil.
I've owned a number of Model A's, and never had a vapor lock problem with any of them. Model A's have a gravity fed fuel system, with the gas tank in the cowl and the fuel line's only about a foot long. Now I've also had a few of 32-41 flathead Ford V8's, and I often struggled with them vapor locking. Either way, I've never heard of using diesel fuel to combat it, and don't think I would ever put diesel in a Corvette.
I'd be more inclined to think the issue was ignition related, maybe a bad coil.
Safety Car
Joined: Oct 2007
Posts: 3,729
Likes: 267
From: Austin Texas
Corvette of the Year Winner 2017
2016 C3 of Year Finalist
vapor lock is the action of shutting down the car hot, which no longer is pumping fuel into carb.
... if the carb. is very hot, it can boil off the fuel inside the carb. (turning it into vapor)
thus creating a difficult vehicle to start due to no fuel in the Carb.
after cranking for some time, you will pump fuel back into the carb. and it finally starts.
dieing at stop light while running is another problem.
... if the carb. is very hot, it can boil off the fuel inside the carb. (turning it into vapor)
thus creating a difficult vehicle to start due to no fuel in the Carb.
after cranking for some time, you will pump fuel back into the carb. and it finally starts.
dieing at stop light while running is another problem.
Last edited by 69Vett; Aug 1, 2016 at 07:43 PM.
Team Owner
Joined: Jan 2006
Posts: 37,637
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From: Crossville TN
Boiling point of ethano-laced fuel is lower than straight gasoline; in hotter climates, fuel vapor lock can be an issue with ethanol fuels.
As mentioned, put a heat insulator and a heat shield under the carb. It would also be best to remove the cylinder heads and install blocker plates on the heat riser crossover passsages. That will minimize added heat. Another option is to install a fuel return line from an appropriate fuel pump to the tank. That will minimize heating of stagnant fuel in the lines.
As mentioned, put a heat insulator and a heat shield under the carb. It would also be best to remove the cylinder heads and install blocker plates on the heat riser crossover passsages. That will minimize added heat. Another option is to install a fuel return line from an appropriate fuel pump to the tank. That will minimize heating of stagnant fuel in the lines.
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